Granted Patent
Utility
US 4,884,516 · App. 07/277,822
Inclined grate apparatus for use in the combustion chamber of a combustion furnace
Inventor:
Lauri G. Linsen
Patented Case
View Patent ↗
Granted: Dec 5, 1989
Filed: Nov 30, 1988
Inventor
Lauri G. Linsen
Assignee (at issue)
A. Ahlstrom Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.